5,717 results match your criteria Hamstring Injury


Acute Effect of Active and Passive Static Stretching on Elastic Modulus of the Hamstrings.

Sports Med Int Open 2018 Nov 15;2(6):E163-E170. Epub 2018 Nov 15.

Graduate School of Health Sciences, Sapporo Medical University, Sapporo, Japan.

The purpose of this study was to investigate differences in the acute effects of passive knee extension (PKE) and active knee extension (AKE) stretching on the shear elastic modulus of the hamstrings. In 20 healthy men, maximum knee extension (maximum range of motion [ROM]) and shear elastic modulus of the hamstrings (biceps femoris long head, semitendinosus, semimembranosus) were measured before (Pre) and after (Post) AKE and PKE stretching. The maximum ROM during stretching was measured. Read More

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November 2018

Does a bounding exercise program prevent hamstring injuries in adult male soccer players? - A cluster -RCT.

Scand J Med Sci Sports 2018 Dec 9. Epub 2018 Dec 9.

Utrecht University, University Medical Center Utrecht, Rudolf Magnus Institute of Neurosciences, Department Rehabilitation, Physical Therapy Science & Sports, Utrecht, The Netherlands.

Background: Although the Nordic Hamstring Exercise (NHE) prevents hamstring injury in soccer players effectively, the annual incidence of these injuries still increases. This may be because of poor long-term compliance with the program. Furthermore, the timing and amplitude of gluteal and core muscle activation seem to play an important role in hamstring injury prevention, the NHE program was not designed to improve activation of these muscles. Read More

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December 2018

Anterolateral Ligament Reconstruction Practice Patterns Across the United States.

Orthop J Sports Med 2018 Dec 3;6(12):2325967118811063. Epub 2018 Dec 3.

Department of Orthopedic Surgery, Henry Ford Hospital, Detroit, Michigan, USA.

Background: A proposed mechanism for recurrent instability following anterior cruciate ligament (ACL) reconstruction is failure of the anterolateral ligament (ALL). Presently, there are a number of approaches to treating ALL pathology.

Purpose: To determine practice patterns among orthopaedic surgeons regarding ALL during ACL reconstruction. Read More

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December 2018

Improvements in Thigh Strength Symmetry Are Modestly Correlated With Changes in Self-Reported Function After Anterior Cruciate Ligament Reconstruction.

Orthop J Sports Med 2018 Nov 28;6(11):2325967118807459. Epub 2018 Nov 28.

Orthopedics Biomechanics Laboratory and Sports Medicine Center, Mayo Clinic, Rochester, Minnesota, USA.

Background: The association between quadriceps strength and functional outcomes after anterior cruciate ligament reconstruction (ACLR) is a focus of current research, while evaluations of hamstring strength are limited, despite the frequent use of hamstring autografts.

Purpose/hypothesis: The purpose of this study was to determine the relationship between changes in quadriceps and hamstring strength symmetry and self-reported outcomes before ACLR and at 12 and 24 weeks after surgery. We hypothesized that improvements in quadriceps and hamstring strength symmetry would be correlated with improvements in self-reported outcome measures within the first 6 months after ACLR. Read More

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November 2018

Angle-specific analysis of isokinetic quadriceps and hamstring torques and ratios in patients after ACL-reconstruction.

BMC Sports Sci Med Rehabil 2018 6;10:23. Epub 2018 Dec 6.

5Exercise Science and Neuroscience, Department of Exercise & Health, University of Paderborn, Warburger Str. 100, 33098 Paderborn, Germany.

Background: Strength deficits, muscle imbalances, and quadriceps inhibition are common after the surgical reconstruction of the anterior cruciate ligament (ACL), even after the patient's returned-to-sport. Typically, asymmetries between the operated and non-operated leg as well as the hamstring/quadriceps (HQ) ratio are calculated using maximum isokinetic torque values. Moreover, the knee flexion angles, which correspond to the measured torque values, were not considered. Read More

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December 2018
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Quadriceps Tendon Autograft Anterior Cruciate Ligament Reconstruction With Independent Suture Tape Reinforcement.

Authors:
Michael G Saper

Arthrosc Tech 2018 Nov 29;7(11):e1221-e1229. Epub 2018 Oct 29.

Department of Orthopedics and Sports Medicine, Seattle Children's Hospital; and Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington, U.S.A.

Anterior cruciate ligament (ACL) injuries are common among adolescent athletes and are rising with increased participation in higher level athletics at earlier ages. In these young patients, often with open physes, soft tissue grafts continue to be the primary graft choice for ACL reconstruction. Reinjury continues to be a concern in this high-risk age group, with failure rates 2 to 3 times higher than in adults. Read More

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November 2018

Open Anatomic Coracoclavicular Ligament Reconstruction by Modified Conjoint Tendon Transfer for Treatment of Acute High-Grade Acromioclavicular Dislocation.

Authors:
Naser M Selim

Arthrosc Tech 2018 Nov 15;7(11):e1157-e1165. Epub 2018 Oct 15.

Knee Surgery-Arthroscopy and Sports Injuries Unit, Orthopedic Department, Faculty of Medicine, Mansoura University Hospital, Mansoura, Egypt.

There is no ideal surgical technique for the treatment of acromioclavicular (AC) dislocations. Reconstruction of the coracoclavicular ligaments (CCLs) for the treatment of AC dislocations is evolving. Many techniques for CCL reconstruction have been described. Read More

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November 2018

Endoscopic Proximal Hamstring Repair and Ischial Bursectomy Using Modified Portal Placement and Patient Positioning.

Arthrosc Tech 2018 Nov 1;7(11):e1071-e1078. Epub 2018 Oct 1.

Southern California Orthopaedic Institute, Van Nuys, California, U.S.A.

Endoscopic management has become an effective method to repair proximal hamstring injuries. However, due to the complexity of such a procedure, the dissemination of the technique of endoscopic hamstring repair has occurred slowly among orthopaedic surgeons. This Technical Note with a video modifies previously described techniques and provides safer and more simplified endoscopic management of proximal hamstring injuries. Read More

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November 2018

Easy method for measuring stretching intensities in real clinical settings and effects of different stretching intensities on flexibility.

Authors:
Wootaek Lim

J Back Musculoskelet Rehabil 2018 Nov 26. Epub 2018 Nov 26.

Department of Physical Therapy, College of Health and Welfare, Woosong University, Daejeon, Korea.

Background: Flexibility changes according to stretching intensity have been rarely investigated. I aimed to assess the effect of different stretching intensities on hamstring flexibility by measuring them in a setting similar to real clinical settings.

Methods: Stretching intensities were quantified using an easy method, and participants were grouped according to intensity: 100% (P100), 70% (P70), 40% (P40), and 10% (P10) of maximum voluntary isometric contraction. Read More

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November 2018

Increased erythrocyte aggregation following an acute bout of eccentric isokinetic exercise does not exceed two days.

Biorheology 2018 ;55(1):15-24

Pamukkale University, Faculty of Medicine, Department of Physiology, Kinikli, Denizli, Turkey.

Background: Isokinetic exercise is used to reduce strength imbalance and to enhance performance.

Objective: The aim of this study was to investigate the acute effects of a single bout of eccentric isokinetic exercise on hemorheology (erythrocyte deformability and aggregation), total oxidant/antioxidant status (TOS/TAS) and oxidative stress index (OSI) in active individuals.

Methods: The study comprises 11 active, healthy, male subjects (mean age of 19. Read More

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January 2018

Sex differences in gluteal muscle forces during running.

Sports Biomech 2018 Dec 11:1-11. Epub 2018 Dec 11.

b Department of Health Professions, Physical Therapy Program , La Crosse Institute for Movement Science, University of Wisconsin - La Crosse , La Crosse , WI , USA.

Sex differences in common sports injuries to the lower extremity have been reported. Biomechanical factors of the hip have been investigated between sexes with regard to running-related injury. This study investigates gluteal muscle forces between sexes to aid in our understanding of sex-related biomechanical factors in running. Read More

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December 2018

Immediate Effects of Dry Needling as a Novel Strategy for Hamstring Flexibility: A Single Blinded Clinical Pilot Study.

J Sport Rehabil 2018 Dec 11:1-23. Epub 2018 Dec 11.

4 Bethesda Physiocare, Bethesda, MD, USA; Myopain Seminars, Bethesda, MD, USA.

Context:: There are numerous studies on the benefits of dry needling (DN) for pain relief. No studies exist examining the effects of DN on hamstring flexibility.

Objective:: To determine the immediate effects of dry needling (DN) on hamstring flexibility in healthy subjects with shortened hamstrings. Read More

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December 2018

Comparison of the Position-Matching and Position-Reproducing Tasks to Detect Deficits in Knee Position Sense After Reconstruction of the Anterior Cruciate Ligament.

J Sport Rehabil 2018 Dec 11:1-23. Epub 2018 Dec 11.

1 Faculty of Sport Sciences, Waseda University, Tokorozawa-city, Saitama, Japan.

Context:: Deficits in knee position sense following reconstruction of the anterior cruciate ligament (ACL) can delay an athlete's return to sport participation and increase the risk of re-injury. Deficits in position sense post-reconstruction have been evaluated using either a position-reproducing or position-matching task.

Objective:: The aim of our study was to combine both to determine which assessment would be more effective to identify deficits in knee position sense. Read More

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December 2018

Validation study of the Functional Assessment Scale for Acute Hamstring injuries in Spanish professional soccer players.

Clin Rehabil 2018 Dec 10:269215518815540. Epub 2018 Dec 10.

1 Centro de Investigación Traslacional en Fisioterapia and Department of Pathology and Surgery, Physiotherapy Area, Miguel Hernandez University, Sant Joan d'Alacant, Spain.

Objective:: To cross-culturally adapt and validate the Functional Assessment Scale for acute hamstring injury for professional Spanish-speaking soccer players.

Design:: Clinical measurement study. Cross-cultural adaptation was conducted following international recommendations. Read More

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December 2018

Biomechanical Evaluation of Virtual Reality-based Turning on a Self-Paced Linear Treadmill.

Gait Posture 2018 Sep 24;65:157-162. Epub 2018 Jul 24.

Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea (Keonyoung Oh: Hyung-Soon Park:

Background: Patients with brain injuries such as Parkinson's disease or stroke exhibit abnormal gait characteristics especially during gait transitions such as step initiation and turning. Since such transitions could precipitate falls and resultant injuries, evaluation and rehabilitation of non-steady state gait in those patients are important. Whereas body weight supported treadmill training (BWSTT) provides a safe and controlled environment for gait training, it is unable to adequately train for gait transitions since the typical linear treadmill does not allow for changes in walking direction and natural fluctuations in speed. Read More

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September 2018
6 Reads

Direct Comparison of Modified Jobe and Docking Ulnar Collateral Ligament Reconstruction at Midterm Follow-up.

Am J Sports Med 2018 Nov 30:363546518812421. Epub 2018 Nov 30.

Burke and Bradley Orthopedics, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA.

Background:: The modified Jobe and docking techniques are the 2 most commonly employed techniques for ulnar collateral ligament (UCL) reconstruction among overhead athletes. However, no study has directly compared these techniques performed by a single surgeon. Current comparisons of these techniques have relied solely on systematic reviews and biomechanical studies. Read More

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November 2018
1 Read

Influence of a periodized circuit training protocol on intermuscular adipose tissue of patients with knee osteoarthritis: protocol for a randomized controlled trial.

BMC Musculoskelet Disord 2018 Nov 30;19(1):421. Epub 2018 Nov 30.

Department of Physical Therapy, Federal University of São Carlos (UFSCar), Km 235,Rod. Washington Luís-SP310, Postal code, São Carlos, (SP), 13565-905, Brazil.

Background: The objective of this study is to analyze the influence of a 14-week periodized circuit training protocol on patients with knee osteoarthritis (OA), in randomized intervention groups, on thigh intermuscular adipose tissue (interMAT), body composition, systemic inflammation, cartilage degradation, and its repercussion on pain, functional performance and quality of life.

Methods: This study presents a protocol for a randomized controlled trial. Sixty selected participants diagnosed with knee OA grades II and III, 40-65 years old and BMI < 30 kg/m will be randomly divided into three groups:periodized circuit training, strength training, and educational protocol. Read More

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November 2018
1 Read

Limited predictive value of pre-surgical level of functioning for functioning at 3 and 12 months after TKA.

Knee Surg Sports Traumatol Arthrosc 2018 Nov 28. Epub 2018 Nov 28.

Department of Epidemiology, Maastricht University, Maastricht, The Netherlands.

Purpose: A total knee arthroplasty (TKA) is a cost-effective option to relieve pain and improve knee function in patients suffering from osteoarthritis. However, results differ among patients. The predictive value of pre-surgically assessed factors on the level of functioning after 3 and 12 months was investigated in this study. Read More

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November 2018
1 Read

Mechanical assessment of tripled hamstring tendon graft when using suspensory fixation for cruciate ligament reconstruction.

J Exp Orthop 2018 Nov 27;5(1):48. Epub 2018 Nov 27.

Ortho One Orthopaedic Speciality Center, Coimbatore, Tamil Nadu, India.

Background: Tripling semitendinosus tendon for ACL graft preparation facilitates creation of longer and thicker grafts. Our objective was to evaluate the mechanical difference between tripled tendon grafts, prepared by three methods, by comparing with quadrupled tendon graft.

Methods: Bovine hind-foot hoof extensors were allocated to four groups. Read More

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November 2018
1 Read

Patient-Specific Parameters Associated With Traction in Primary and Revision Hip Arthroscopic Surgery.

Orthop J Sports Med 2018 Nov 19;6(11):2325967118807707. Epub 2018 Nov 19.

Department of Orthopaedics, University of Utah School of Medicine, Salt Lake City, Utah, USA.

Background: Distraction of the hip joint is a necessary step during hip arthroscopic surgery. The force of traction needed to distract the hip is not routinely measured, and little is known about which patient factors may influence this force.

Purpose: To quantify the force of traction required for adequate distraction of the hip during arthroscopic surgery and explore the relationship between hip joint stiffness and patient-specific demographics, flexibility, and anatomy. Read More

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November 2018
1 Read

The Risk Factors of Hamstring Strain Injury Induced by High-Speed Running.

J Sports Sci Med 2018 Dec 20;17(4):650-655. Epub 2018 Nov 20.

Graduate School of Health and Sport Sciences, Chukyo University, Aichi, Japan.

Hamstring strain injury is a multifactorial and complex problem involving interactions among various factors. Information about risk factors for this injury is inconsistent among studies because the strong effects of confounding factors and injury situations are often ignored. We investigated the relationship between hamstring strain induced by high-speed running and intrinsic risk factors, including hip muscle morphology and function, by excluding the influences of confounding factors. Read More

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December 2018
2 Reads

Can Elite Dancers Return to Dance After Ultrasound-Guided Platelet-Rich Plasma (PRP) Injections?

J Dance Med Sci 2018 Dec;22(4):225-232

Center for Musculoskeletal Care, New York University Langone Medical Center, New York, New York, USA.

Dancers exert tremendous stresses on the lower extremities rendering them prone to injuries that can curtail training and performance. The goal of this study was to evaluate clinical improvement in a population of elite dancers following treatment with ultrasound-guided platelet-rich plasma (PRP) injections of various lower extremity sites by assessing when they were able to return to dance. Nineteen dancers (13 female, 6 male; ages 15 to 42) were treated between 2009 and 2016 at sites that included: hamstring tendon (1), proximal iliotibial band (1), patellar tendon (3), posterior tibial tendon (5), peroneus brevis tendon (3), plantar fascia (3), and the first metatarsophalangeal (MTP) joint capsule (3). Read More

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December 2018
2 Reads

Some Effects of Supplemental Pilates Training on the Posture, Strength, and Flexibility of Dancers 17 to 22 Years of Age.

J Dance Med Sci 2018 Dec;22(4):192-202

Johns Hopkins Physical Medicine and Rehabilitation, Johns Hopkins Medical Center, Baltimore Maryland, USA.

Proper alignment in dancers is a pre-requisite for achieving aesthetic line and form and for efficient execution of movement. Pelvic alignment is a common deficit in dancers that results in faulty technique and impaired performance. Dancers must be able to obtain their personal neutral alignment to avoid injury and achieve ease of execution. Read More

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December 2018
2 Reads

5-Year Survival of Pediatric Anterior Cruciate Ligament Reconstruction With Living Donor Hamstring Tendon Grafts.

Am J Sports Med 2018 Nov 26:363546518804502. Epub 2018 Nov 26.

North Sydney Orthopaedic and Sports Medicine Centre, Wollstonecraft, New South Wales, Australia.

Background:: It is well accepted that there is a higher incidence of repeat anterior cruciate ligament (ACL) injuries in the pediatric population after ACL reconstruction (ACLR) with autograft tissue compared with adults. Hamstring autograft harvest may contribute to the risk for repeat ACL injuries in this high functional demand group. A novel method is the use of a living donor hamstring tendon (LDHT) graft from a parent; however, there is currently limited research on the outcomes of this technique, particularly beyond the short term. Read More

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November 2018
1 Read

Hamstring lengthening in cerebral palsy and the use of musculoskeletal modelling.

Authors:
Caroline Stewart

Dev Med Child Neurol 2018 Nov 25. Epub 2018 Nov 25.

ORLAU - RJAH Orthopaedic Hospital, Oswestry, Shropshire, UK.

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November 2018
1 Read

Long-term muscle changes after hamstring lengthening in children with bilateral cerebral palsy.

Dev Med Child Neurol 2018 Nov 25. Epub 2018 Nov 25.

Clinic for Orthopedic and Trauma Surgery, University Hospital Heidelberg, Heidelberg, Germany.

Aim: To evaluate short-term (1y postoperatively; E1) and long-term (at least 4y postoperatively; E2) changes in hamstring muscle-tendon length (MTL) and lengthening velocity after hamstring lengthening in children with bilateral cerebral palsy (CP).

Method: Three-dimensional gait analysis was performed in 19 children (16 males, 3 females; 36 limbs; mean age at surgery 9y [SD 3y]; range 6-10y) with flexed knee gait, preoperative ankle dorsiflexion lower than 20 degrees, and CP before bilateral hamstring lengthening (E0), at E1 and E2. Hamstring MTL (normalized by leg length) and velocity were assessed via OpenSim software. Read More

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November 2018
2 Reads

Are athletes able to resume sport at six-month mean follow-up after anterior cruciate ligament reconstruction? Prospective functional and psychological assessment from the French Anterior Cruciate Ligament Study (FAST) cohort.

Knee 2018 Nov 22. Epub 2018 Nov 22.

Clinique du Sport Paris, Paris, France; Institut de l'Appareil Locomoteur Nollet, Paris, France; Racing 92, Le Plessis-Robinson, France.

Background: The decision to return to sport following anterior cruciate ligament (ACL) reconstruction should not only be based on time since surgery. This study aimed to assess, using isokinetic and neuromuscular (hops) testing in a large group, postoperative objective functional recovery of the knee. The secondary objective was to determine the relationship between psychological, functional scores, and these postoperative tests. Read More

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November 2018
1 Read

Surgical fenestration and rehabilitation of a sports traumatic non-union ischial tuberosity fracture - Case report.

Int J Surg Case Rep 2018 Nov 17;53:362-366. Epub 2018 Nov 17.

Department of Orthopaedic Surgery, Aalborg University Hospital, Hobrovej 18-22, 9000, Aalborg, Denmark. Electronic address:

Introduction: Ischial tuberosity fractures and complications may be an under recognized diagnosis in adolescent athletes. Operative interventions differ and may include anchor re-fixations, resections and osteostimulating drilling and partial hamstring releases. This case report illustrates a novel and less invasive management of a non-union following a proximal ischial tuberosity avulsion. Read More

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November 2018
2 Reads

Reconstruction of chronic proximal hamstring avulsion injuries using ipsilateral distal hamstring tendons results in good clinical outcomes and patient satisfaction.

Knee Surg Sports Traumatol Arthrosc 2018 Nov 23. Epub 2018 Nov 23.

Perth Orthopaedic and Sports Medicine Centre, West Perth, Western Australia, 6005, Australia.

Purpose: To report outcomes following proximal hamstring reconstruction employing an ipsilateral distal hamstring tendon autograft, in patients with chronic proximal ruptures.

Methods: Six patients presenting with a chronic proximal hamstring avulsion and a medial time from injury of 11.0 months (range 7-18), confirmed via magnetic resonance imaging, underwent proximal hamstring repair using a free graft harvested from the ipsilateral distal hamstrings. Read More

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November 2018
3 Reads

BONE TUNNEL ENLARGEMENT WITH NON-METALLIC INTERFERENCE SCREWS IN ACL RECONSTRUCTION.

Acta Ortop Bras 2018 ;26(5):305-308

Associação Beneficíente Hospital Universitário (ABHU), Marília, SP, Brazil.

Objective: To compare the widening of bone tunnels between poly-etheretherketone (PEEK), absorbable polylactic acid DL (PLDL) and tricalcium phosphate (TCP) interference screws in anterior cruciate ligament (ACL) reconstruction.

Methods: Three groups of patients undergoing ACL reconstruction with at least 1 year of follow-up using the out-in drilling technique and hamstring as a graft were assessed. The patients were divided according to the type of interference screw used (PEEK, PLDL and TCP). Read More

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January 2018
3 Reads

Effects of preconditioning hamstring resistance exercises on repeated sprinting-induced muscle damage in female soccer players.

Biol Sport 2018 Sep 27;35(3):269-275. Epub 2018 Aug 27.

Department of Health, Exercise Science, and Recreation Management, The University of Mississippi, University, MS 38677, USA.

To examine whether adding preconditioning hamstring resistance exercises to a regular warm-up prior to a repeated sprinting exercise provides protection against the sprinting-induced muscle damage. Ten female soccer players (mean ± SD age: 21.3 ± 4. Read More

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September 2018
2 Reads

Posteromedial versus Anteromedial Hamstring Tendon Harvest for Anterior Cruciate Ligament Reconstruction: A Retrospective Comparison of Accidental Gracilis Harvests, Outcomes, and Operative Times.

J Knee Surg 2018 Nov 16. Epub 2018 Nov 16.

Department of Orthopaedic Surgery, MedStar Washington Hospital Center, Washington, District of Columbia.

Hamstring autografts are frequently harvested for anterior cruciate ligament reconstruction (ACLR), traditionally through the anteromedial (AM) approach. Recently, a posteromedial (PM) approach has been described. The primary purpose of this study was to compare rates of unintentional gracilis (Gr) harvest or premature tendon amputation with these approaches. Read More

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November 2018
1 Read

Biologically Enhanced Hamstring Tendon Transfer for Treatment of Acute Rupture of Posterior Tibialis Tendon in an Athlete: Case Report.

J Foot Ankle Surg 2018 Nov 15. Epub 2018 Nov 15.

Surgeon, Department of Orthopedic Surgery, Sports Medicine, Bellevue University Medical Center, Mansourieh, Lebanon.

We report the case of a 32-year-old basketball player who presented with an acute flatfoot deformity after performing a unipodal power jump. Rupture of the posterior tibial tendon within the foot was diagnosed and then treated by hamstring tendon transfer combined with application of autologous biologic preparations. The functional outcome at 18 months was good. Read More

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November 2018
2 Reads

Gait Impairments in Patients without Lower Limb Hypertonia Early after Stroke are Related to Weakness of Paretic Knee Flexors.

Arch Phys Med Rehabil 2018 Nov 14. Epub 2018 Nov 14.

Center for Neuroscience and Neurological Recovery, Methodist Rehabilitation Center, Jackson, MS.

Objective: To describe gait characteristics of patients without clinical evidence of lower limb hypertonia within 2 months of stroke and explore the relationship between gait and residual motor function.

Design: Cohort study.

Setting: Motion analysis laboratory in a tertiary-care free-standing rehabilitation hospital. Read More

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November 2018
10 Reads

Return to Sport After Surgical Management of Proximal Hamstring Avulsions: A Systematic Review and Meta-analysis.

Clin J Sport Med 2018 Nov 15. Epub 2018 Nov 15.

Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, ON, Canada.

Objective: To assess the rates and timing of return to sport for the surgical management of proximal hamstring avulsions (PHAs).

Methods: Three databases, PubMed, MEDLINE, and EMBASE, were searched from database inception until October 7, 2017, by 2 reviewers independently and in duplicate. The inclusion criteria were studies reporting return to sport outcomes for surgical management of acute, chronic, complete, and partial PHA. Read More

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November 2018
4 Reads

[Minimally invasive proximal hamstring insertion repair].

Oper Orthop Traumatol 2018 Dec 15;30(6):419-434. Epub 2018 Nov 15.

Centrum für Muskuloskeletale Chirurgie, Charité - Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Deutschland.

Objective: Minimally invasive endoscopic reconstruction of avulsion injuries of the proximal hamstring insertion to prevent persistent weakness and pain.

Indications: Fresh retracted 2‑ and 3‑tendon avulsion injuries of the proximal hamstring insertion. Unsuccessful conservative therapy of less retracted injuries. Read More

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December 2018
5 Reads

Real-time Electromyography-driven Functional Electrical Stimulation Cycling System for Chronic Stroke Rehabilitation.

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:2515-2518

Stroke-induced lower extremity dysfunction has become a severe medical problem nowadays and effective rehabilitation methods are in great demand. In this work, a new real-time Electromyography-driven Functional Electrical Stimulation (FES) cycling system was developed to help chronic stroke patients with lower limb rehabilitation training. To evaluate the feasibility and effectiveness of this system, 3 chronic stroke subjects were recruited and each received 20 training sessions where real-time Electromyography (EMG) was used to interact with the cycling system. Read More

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July 2018
1 Read

Empirical Based Modeling for the Assessment of Dynamic Knee Stability: Implications for Anterior Cruciate Ligament Injury Risk.

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:1676-1679

Anterior cruciate ligament (ACL) injuries are common sports injuries, costing the U.S. roughly $1 billion annually. Read More

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July 2018
3 Reads

Cycling-enhanced Knee Exoskeleton Using Planar Spiral Spring.

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:1-6

Reported in our previous study on passive cycling support, the energy cost of knee extension can be reduced using the energy stored from knee flexion by torsion spring. In the current study, the planar spiral spring is applied to attain the compact design of the cycling augmented knee exoskeleton (CAKE-2). The surface electromyography (EMG) results over the rectus femoris muscles of three healthy male participants performing constant power cycling on a trainer at 200 W and 225 W are analyzed in time-frequency via the continuous wavelet transform. Read More

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July 2018
1 Read

Knee sensorimotor control following anterior cruciate ligament reconstruction: A comparison between reconstruction techniques.

PLoS One 2018 15;13(11):e0205658. Epub 2018 Nov 15.

Clínica MEDS, Santiago, Chile.

The sensorimotor system helps to maintain functional joint stability during movement. After anterior cruciate ligament (ACL) injury and reconstruction, several sensorimotor deficits may arise, including altered proprioception and changes in neuromuscular control. It is still unknown whether the type of autograft used in the reconstruction may influence knee sensorimotor impairments. Read More

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November 2018
4 Reads

Nordic Exercise Should Not Be Used for Predictive Modeling of Hamstring Injuries.

Authors:
Li Li Mianfang Ruan

Med Sci Sports Exerc 2018 Dec;50(12):2614

Department of Health Sciences and Kinesiology Georgia Southern University Statesboro, GA College of Physical Education Ningbo University Ningbo, Zhejiang, PEOPLE'S REPUBLIC OF CHINA.

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December 2018
4 Reads
3.983 Impact Factor

The Influence of Hamstring Muscle Peak Torque and Rate Of Torque Development for Sprinting Performance in Football Players: A Cross-Sectional Study.

Int J Sports Physiol Perform 2018 Nov 14:1-27. Epub 2018 Nov 14.

1 Sports Orthopedic Research Center - Copenhagen (SORC-C), Department of Orthopedic Surgery, Copenhagen University Hospital, Amager-Hvidovre, Denmark.

Purpose:: This cross-sectional study aimed to investigate the association between hamstring muscle peak torque and rapid force capacity (rate of torque development: RTD) versus sprint performance in elite youth football players.

Methods:: Thirty elite academy youth football players (16.75 ± 1. Read More

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November 2018
3 Reads

Validity of an on-Field Readaptation Program Following a Hamstring Injury in Professional Soccer.

J Sport Rehabil 2018 Nov 14:1-20. Epub 2018 Nov 14.

b Camilo José Cela University. Faculty of Physical Activity and Sports Sciences Calle Castillo de Alarcón, Madrid, Spain.

Context:: Despite the presence of various injury prevention programs, the rate of hamstring injuries and re-injuries is increasing, warranting the need for a soccer-specific rehabilitation program.

Objective:: To develop and validate a new, functional on-field program for the rehabilitation and readaptation after a hamstring strain injury through a panel of experts; and determine its usefulness through the application of this program in professional soccer players.

Design:: A thirteen-item program was developed which was validated by a panel of experts and later applied to professional soccer players. Read More

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November 2018
15 Reads

Hold-relax and contract-relax stretching for hamstrings flexibility: A systematic review with meta-analysis.

Phys Ther Sport 2018 Nov 3;35:42-55. Epub 2018 Nov 3.

Department of Physical Therapy, University of the Philippines Manila, Manila, Philippines.

Objective: To synthesize evidence on the effects of hold-relax and contract-relax stretching (HR and CR) on hamstrings flexibility compared with no intervention and other stretching techniques.

Design: Electronic databases (PubMed, PEDro, Cochrane CENTRAL, Scopus, LILACS) were searched from inception until March 31, 2014 and updated until May 31, 2017. Randomized controlled trials involving HR and CR to improve hamstrings flexibility in adults (aged ≥18 years old) with or without a pathological condition were included. Read More

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November 2018
15 Reads

The significant effect of the medial hamstrings on dynamic knee stability.

Knee Surg Sports Traumatol Arthrosc 2018 Nov 12. Epub 2018 Nov 12.

Orthopaedic Biomechanics Laboratory, VA Long Beach Healthcare System, Long Beach, CA, USA.

Purpose: While hamstring autograft is a popular option for the general population, BTB autograft is still significantly more popular among professional athletes due to concerns of altering knee kinematics with hamstring harvest. This study seeks to quantify the contribution of the medial hamstrings to knee stability.

Methods: Valgus knee laxity, anterior tibial translation, and rotational motion were measured in eight fresh-frozen cadaveric knees after forces were applied on the tibia in each plane (coronal, sagittal, and axial). Read More

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November 2018
3 Reads

Fascia thickness, aging and flexibility: is there an association?

J Anat 2019 Jan 11;234(1):43-49. Epub 2018 Nov 11.

Department of Molecular Medicine, Institute of Human Anatomy, University of Padova, Padova, Italy.

The morphology of the connective tissue may play an important role in locomotor mechanics. Recent research has revealed an association between increased fascia thickness and reduced joint flexibility in patients with chronic pain. The present study aimed to examine the relationship of both factors in healthy individuals, additionally testing the hypothesis that older subjects display a higher fascia thickness. Read More

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January 2019
8 Reads

Tibial tunnel widening following anterior cruciate ligament reconstruction: A retrospective seven-year study evaluating the effects of initial graft tensioning and graft selection.

Knee 2018 Dec 7;25(6):1107-1114. Epub 2018 Nov 7.

Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Providence, RI, United States of America; School of Engineering, Brown University, Providence, RI 02903, United States of America. Electronic address:

Purpose: To investigate tibial tunnel widening in ACL reconstruction patients over seven years to establish the effects of initial graft tension on tibial widening and clinical outcomes when using both patellar tendon (BTB) and hamstring tendon (HS) grafts.

Methods: Ninety patients, who were reconstructed with BTB or HS autografts, were randomized using one of two initial graft tension protocols; 1) tensioned to restore normal anteroposterior laxity ("low-tension"; n = 46) and 2) tensioned to over-constrain anteroposterior (AP) laxity by two millimeters ("high-tension"; n = 44). Seventy patients had post-surgical data with 45 available for review at seven years. Read More

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December 2018

Anterior cruciate ligament reconstruction is associated with greater tibial tunnel widening when using a bioabsorbable screw compared to an all-inside technique with suspensory fixation.

Knee Surg Sports Traumatol Arthrosc 2018 Nov 7. Epub 2018 Nov 7.

Orthopaedic Unit and Kirk Kilgour Sports Injury Center, S. Andrea Hospital, University of Rome "Sapienza", Via di Grottarossa 1035-1039, 00189, Rome, Italy.

Purpose: To compare clinical outcomes and tunnel widening following anterior cruciate ligament reconstruction (ACLR) performed with an all-inside technique (Group A) or with a bioabsorbable tibial screw and suspensory femoral fixation (Group B).

Methods: Tunnel widening was assessed using computed tomography (CT) and a previously validated analytical best fit cylinder technique at approximately 1-year following ACLR. Clinical follow-up comprised evaluation with IKDC, KSS, Tegner, Lysholm scores, and knee laxity assessment. Read More

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November 2018
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